Finding the Third Proportional to 25,890 and 56,518.50

Step by Step Solution

1. Step 1: Write the proportion equation
   25,890 : 56,518.50 = 56,518.50 : x
2. Step 2: Convert to fraction form
   25,890/56,518.50 = 56,518.50/x
3. Step 3: Cross multiply
   25,890x = 56,518.50 × 56,518.50
4. Step 4: Simplify right side
   25,890x = 3,194,340,842.25
5. Step 5: Solve for x
   x = 3,194,340,842.25/25,890
6. Step 6: Final answer
   x = 123,381.26